milligram

noun

mil·​li·​gram ˈmi-lə-ˌgram 

: a unit of mass equal to ¹/₁₀₀₀ gram see Metric System Table

Examples of milligram in a Sentence

Recent Examples on the Web

The addictive opioid drug is 50 times more potent than morphine and can trigger a fatal overdose with as little as 2 milligrams, the equivalent of a few grains of salt. —Mark Zeigler, San Diego Union-Tribune, 13 Sep. 2025

The drink — available in watermelon strawberry, raspberry melon and peach tangerine — includes 740 milligrams of electrolytes and three essential B vitamins, with only two grams of sugar added. —Kaleigh Werner, Footwear News, 10 Sep. 2025

Each antihistamine tablet is formulated with 10 milligrams of cetirizine hydrochloride to help reduce hives and relieve itching due to hives. —Adam Mills, MSNBC Newsweek, 10 Sep. 2025

Meanwhile, just two milligrams of fentanyl, the size of just a few grains of sand, can result in an overdose, according to the website for Customs and Border Protection. —Sophia Compton, FOXNews.com, 9 Sep. 2025

Word History

Etymology

French milligramme, from milli- + gramme gram

First Known Use

1797, in the meaning defined above

Rhymes for milligram

• abraham
• anagram
• cablegram
• cofferdam
• dendrogram
• diagram
• diaphragm
• epigram
• hexagram
• histogram
• hologram
• instagram

Kids Definition

milligram

noun

mil·​li·​gram ˈmil-ə-ˌgram 

: a weight equal to ¹⁄₁₀₀₀ gram see metric system

Medical Definition

milligram

noun

mil·​li·​gram

variants or chiefly British milligramme

-ˌgram 

: one thousandth of a gram

—abbreviation mg